Flexural fatigue strength of steel fibrous concrete containing mixed steel fibres  

作　　者：SINGH S.P. MOHAMMADI Y. MADAN S.K. 

机构地区：[1]Civil Engineering, National Institute of Technology, Jalandhar 144 011, India [2]Civil Engineering, University of Mohaghegh Ardebili, Ardebil 179, Iran [3]Civil Engineering, National Institute of Technology, Kurukushetra 136 119, India

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2006年第8期1329-1335,共7页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the Indian Council for Cultural Relations,India

摘　　要：This paper reports investigation conducted to study the fatigue performance of steel fibre reinforced concrete (SFRC) containing fibres of mixed aspect ratio. An extensive experimental program was conducted in which 90 flexural fatigue tests were carried out at different stress levels on size 500 mm×100 mm×100 mm SFRC specimens respectively containing 1.0%, 1.5% and 2.0% volume fraction of fibres. About 36 static flexural tests were also conducted to determine the static flexural strength prior to fatigue testing. Each volume fraction of fibres incorporated corrugated mixed steel fibres of size 0.6 mm×2.0 mm×25 mm and 0.6 mm×2.0 mm×50 mm in ratio 50:50 by weight. The results are presented both as S-N relationships, with the maximum fatigue stress expressed as a percentage of the strength under static loading, and as relationships between actually applied fatigue stress and number of loading cycles to failure. Two-million-cycle fatigue strengths of SFRC containing different volume fractions of mixed fibres were obtained and compared with plain concrete.This paper reports investigation conducted to study the fatigue performance of steel fibre reinforced concrete （SFRC） containing fibres of mixed aspect ratio. An extensive experimental program was conducted in which 90 flexural fatigue tests were carried out at different stress levels on size 500 mm× 100 mm×100 mm SFRC specimens respectively containing 1.0%, 1.5% and 2.0% volume fraction of fibres. About 36 static flexural tests were also conducted to determine the static flexural strength prior to fatigue testing. Each volume fraction of fibres incorporated corrugated mixed steel fibres of size 0.6 mm×2.0 mm×25 mm and 0.6 mm×2.0 mm×50 mm in ratio 50：50 by weight. The results are presented both as S-N relationships, with the maximum fatigue stress expressed as a percentage of the strength under static loading, and as relationships between actually applied fatigue stress and number of loading cycles to failure. Two-million-cycle fatigue strengths of SFRC containing different volume fractions of mixed fibres were obtained and compared with plain concrete.

关 键 词：Fatigue strength Static flexural strength Stress level Stress ratio Steel fibre reinforced concrete （SFRC） 

分 类 号：TU528.572[建筑科学—建筑技术科学]